[iOS] Converting texture from ASTC format to RGBA32 drops quality when using GetPixels and SetPixels

How to reproduce:
1. Open user's project
2. Open scene "scene"
3. Go to build settings and switch platform to iOS.
4. Play the scene.

Expected result: converting texture from ASTC to RGBA32 massively drops quality when using GetPixels and SetPixels to duplicate original texture.
Actual result: converting texture from ASTC to RGBA32 does not drop quality when using GetPixels and SetPixels to duplicate original texture.